While the player is in Battle Through the Heavens, the system is in The Great Ruler.

Chapter 87 Xiao Yan's Comprehension, the Meridian Opening Technique!

"Most importantly, Brother Lu!"

Xiao Yan placed his hands on the stone table, his eyes gleaming with excitement, and exclaimed, "When this strange fire spiritual vein is operating at full power, it can actually mobilize the surrounding天地能量 (heaven and earth energy) for a short period of time!"

As he spoke, a blue whirlwind suddenly rose from his palm, drawing the surrounding fallen leaves into a swirling motion.

"This is something only a powerhouse above the Dou Wang level can do!"

Lu Yu was taken aback at first, then shook his head, as this was something he already knew.

As a special constitution in the vast world, spiritual veins are born with the characteristic of resonating with the energy of heaven and earth; otherwise, how could they accelerate cultivation?

"but……"

Xiao Yan changed the subject, his expression becoming serious, and slowly said, "Perhaps because the spiritual veins are newly formed, this state is difficult to maintain. I can only maintain it for three breaths at most, after which the spiritual veins will start to ache faintly."

At this moment, the old man's voice rang out, his voice aged yet tinged with solemnity: "While Xiao Yanzi is fully activating his spiritual veins, I am also carefully observing. This newly formed strange fire spiritual vein is like a newborn infant; it should take some time to grow and adapt before it can stabilize."

Xiao Yan nodded and continued, "Teacher is right. I feel that this spiritual vein is not yet perfectly compatible with my body. It's like a newly transplanted spiritual herb that needs constant nurturing to grow strong."

He gently patted his chest and continued to explain, "Once the spiritual veins are firmly established in my body, they should be able to circulate freely."

"I see."

Lu Yu nodded thoughtfully, then asked in return, "But what effect can three breaths have? It shouldn't make you so excited, right?"

"While it's not enough to aid daily training, it's enough to significantly enhance the power of combat techniques!"

Xiao Yan excitedly slapped the stone table and explained with great interest, "Brother Lu, think about it, the biggest difference between Earth-rank and Profound-rank fighting techniques lies in whether they can draw upon the surrounding天地能量 (heaven and earth energy)!"

He spoke with a hint of pride: "I've personally tested it. When the spiritual veins are operating at full capacity, the speed of the advanced Xuan-rank movement technique 'Wind Dragon Shadow Body' taught by my teacher is in no way inferior to a true Di-rank movement technique!"

"Even the low-level Earth Rank Flame Devouring Wave Ruler can be temporarily boosted to the mid-level Earth Rank level!"

Xiao Yan's eyes shone brightly as he said decisively, "Although this state can only be maintained for one strike, in a life-or-death situation, this one strike is enough to change the entire battle!"

"You can actually do it like that?"

"But won't doing this damage the spiritual veins?"

Lu Yu raised an eyebrow and asked with some curiosity.

Upon hearing this, Xiao Yan chuckled and said, "Don't worry, Brother Lu, I've verified this three-breath time limit repeatedly. As long as it doesn't exceed this time, the impact on the spiritual veins will be negligible."

He paused, then added nonchalantly, "Besides, even if we really manage to destroy the spiritual veins..."

"At worst, we can just use a different kind of fire to reshape it. It just means we'll have to nurture it from scratch..."

Upon hearing Xiao Yan's words, Lu Yu was taken aback, then looked at the young man opposite him with a strange expression.

Good grief, so what do you think spiritual veins are?

If it collapses, can we rebuild it from scratch?
Is your approach really that unconventional?

If people in the world knew about your idea, they would probably go crazy. Do you know how valuable a spiritual vein is?
Could it be that your method of creating spiritual veins is something your future self came up with through some kind of tinkering?
Thinking of that guy's idea of ​​a Buddha's Wrathful Lotus, Lu Yu suddenly felt that his guess was probably pretty accurate.

Even the fearless Buddha's Fury Lotus was something the young Emperor Yan dared to try. After opening up the Endless Fire Domain, what wouldn't a dignified Saint-grade Heavenly Sovereign dare to do?
"However, Brother Lu, this state of full-speed spiritual vein circulation is not easy to activate in battle. I pondered it for a while, and since spiritual veins are formed by strange fire, the corresponding strange fire should also be able to affect spiritual veins. Therefore, based on the principle of spiritual vein resonance, I created a method to induce full-speed spiritual vein circulation." "With this secret technique, this state can be activated at will without prior activation of the spiritual veins. For simplicity and clarity, I named this state 'Vein Opening,' and this secret technique is also called the 'Vein Opening Method'!"

As he spoke, Xiao Yan took out a jade slip from his storage ring and handed it to Lu Yu.

"The method of opening the pulse?"

Lu Yu was stunned for a moment, then couldn't help but gasp.

Good heavens, this kid has only been learning the method of creating different fire and spiritual veins for a short time, and he has already created a secret technique that matches it!
He truly deserves to be called the future Emperor Yan!
But then he thought about it again and breathed a sigh of relief. Luckily, Brother Yan was a decent person. If it had been someone surnamed Tang, he probably would have used this meridian-opening technique to scheme against him later.

He then took the jade slip without any pretense and began to study it carefully.

After a moment, Lu Yu let out a long sigh and said with a complicated expression, "This idea is indeed ingenious... but it's also quite risky."

"Brother Yan."

He pointed to a key step in the jade slip, frowned and asked, "When you were testing this secret technique, weren't you afraid that the spiritual veins would collapse and blow you up?"

Xiao Yan scratched his head sheepishly and said, "It was all luck. I discovered it by accident at first, and then I was really grateful for my teacher's help..."

He cupped his hands in a gesture of respect towards the ring, saying, "I really can't perfect this secret technique on my own."

The old apothecary's voice rang out at the right moment, tinged with a hint of helplessness: "This kid almost exploded during his seventh experiment. If it weren't for me, he would have..."

Before he could finish speaking, he let out a long sigh.

Lu Yu chuckled upon hearing this, then after a moment's thought, took out a jade slip and handed it to Xiao Yan, saying, "Brother Yan, this Meridian Opening Technique is a method you tested with your life; I can't take it for nothing. This jade slip contains a..."

"Brother Lu!"

Xiao Yan suddenly interrupted, his expression more serious than ever before. He pushed the jade slip aside and said sternly, "What do you take me for? If you hadn't taught me the method of shaping spiritual veins, I wouldn't even know what spiritual veins are, let alone create this method of opening veins!"

Lu Yu stared blankly at Xiao Yan's determined eyes, which shone with a stubbornness he knew well.

"it is good."

Lu Yu slowly put away the jade slip, a sincere smile appearing on his lips. He said, "I was being too polite. Since you call me Brother Lu..."

He patted Xiao Yan on the shoulder heavily: "If you need anything in the future, just let me know."

Xiao Yan then smiled, raised his wine cup, and said, "That's more like it! We're family, no need for formalities!"

Lu Yu also raised his teacup, the two smiled at each other, and drank it all in one gulp.

Meanwhile, inside the ring, Yao Lao listened to the commotion outside, and a hint of emotion flashed in his eyes, a ripple appearing in his aged gaze.

In a daze, he seemed to see his old friend again, who always wore a blue robe...

“Feng Xian…” the old apothecary murmured softly, his eyes gradually dimming.

"If there's anyone in this world who still firmly believes I'm alive... it's probably only you..."

(End of this chapter)